US Bridges

Hillsboro RD over E Trib of Williams

FairPosted for load

St. Louis County, Missouri · S 30 T 44 N R 5 E · Structure no. 32405

Built
2007
18 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
5,816
2024 count
Owner
County
County Highway Agency

About this bridge

Hillsboro RD over E Trib of Williams is a concrete continuous culvert carrying Hillsboro RD over E Trib of Williams in St. Louis County, Missouri. It was built in 2007, so it is 18 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5,816 vehicles a day, roughly 3% of them trucks, projected to reach 7,852 by 2044. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesHillsboro RD
CrossesE Trib of Williams
LocationS 30 T 44 N R 5 E
RouteCounty Highway 141
CountySt. Louis County
StateMissouri
Coordinates38.51666, -90.51207
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.2 US tons
Inventory rating56.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,816 (2024)
Projected traffic7,852 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hillsboro RD over E Trib of Williams built?

It was built in 2007, making it 18 years old in 2025.

What condition is Hillsboro RD over E Trib of Williams in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Hillsboro RD over E Trib of Williams carry?

About 5,816 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Hillsboro RD over E Trib of Williams?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Hillsboro RD over E Trib of Williams?

It is owned by the County Highway Agency.